Unfortunately can't seem to find a list of methods names which will inherit or a way to form inheritance for newly defined, unconventional methods. Seems to be a method for all standard form input fields: checkbox, radio, text_field, date_field, select, etc.
Luckily it is possible to simply parse your own html attributes and pass them along into an <input> string instead of relying solely on the super method to return in input variable
In some cases you may wish to pass those html attributes as props to the playbook input kit of your choosing and include logic which applies them to the input within the kit itself
The super method also resolve form scoping for you (i.e. scope[example_field])
If you need to manually resolve scoping you can do so with the @object_name instance variable inside your form method
Check out Date Picker as an example
In summary, use the super method if you can. It will make validation and option parsing much easier. If you cannot there are still work arounds but they require more time and effort to implement.
prepend(UserDefinedField) where UserDefinedField is the module your form method belongs to
Newly defined methods can be tested in doc examples
add <%= form.user_defined :name_argument, key1: "opt_value1", key2: "opt_value2", props: { prop_key: "prop_value" } %> to bottom of form kit
the arguments will be parsed like so name: name_argument, options: { key1: "opt_value1", key2: "opt_value2"}, props: { prop_key: "prop_value" } assuming you have made use of the inherited super method mentioned above